Note 10 - Preferred Stock and Common Stock Warrants (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]

	December 31,			December 31,
	2020			2019
Stock price	$	2.09		$	6.14
Exercise price	$	0.01		$	0.01
Risk-free rate		0.1	%		1.6	%
Volatility		58.6	%		27.6	%
Term (years)		0.8			1.8

Schedule of Allocation of Net Cash Proceeds [Table Text Block]

			Year Ended December 31, 2019
					Series B
			Series B		Convertible
			Warrants		Preferred
Gross proceeds	$	20,945
Equity issuance costs		—
Net proceeds - Initial Fair Value Allocation	$	20,945	$	1,936	$	19,009
Per balance sheet upon issuance			$	1,936	$	19,009